Dry Reforming of Methane over Rare-Earth Metal Oxide Ni-M-Al (M = Ce, La) Catalysts

Alua Manabayeva*, Päivi Mäki-Arvela, Zuzana Vajglová, Mark Martinez-Klimov, Olha Yevdokimova, Anssi Peuronen, Mika Lastusaari, Teija Tirri, Kaisar Kassymkan, Tolkyn S. Baizhumanova, Manapkhan Zhumabek, Rabiga O. Sarsenova, Zauresh T. Zheksenbaeva, Gulnar N. Kaumenova, Vincenzo Russo, Dmitry Yu Murzin*, Svetlana A. Tungatarova

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

1 Sitaatiot (Scopus)
19 Lataukset (Pure)

Abstrakti

Dry reforming of methane (DRM) was investigated using Ni-M oxide catalysts prepared by solution combustion synthesis (SCS) and compared with Ni/α-Al2O3 synthesized by impregnation. According to X-ray diffraction, fresh oxide Ni-La and Ni-Ce catalysts displayed low crystallinity, which was improved after DRM, accompanied by the appearance of metallic Ni. Ni-Ce-Al and Ni-La-Al catalysts formed, respectively, CeAlO3 and LaAlO3 phases during the reaction. For studied catalysts featuring low surface areas ranging from 3 to 12 m2/g, the average metal particle sizes were 12-32 nm according to transmission electron microscopy, with the particles growing larger with time-on-stream (TOS) apart from Ni-α-Al2O3. DRM tests were conducted for different TOSs, demonstrating that the highest CH4 transformation rate was concomitant with the highest deactivation rate during 30 min of time-on-stream. The most stable performance in temperature stability experiments was demonstrated by the Ni-Ce-Al catalyst, for which, similar to other catalysts, the H2/CO ratio remained close to unity. In long-term stability tests, the Ni-Ce-Al catalyst displayed a 3.1-fold higher turnover frequency (TOF) compared with Ni-α-Al2O3, with no significant deactivation. The TOF values were comparable to the literature, highlighting the potential of SCS as an alternative approach for synthesis of DRM catalysts.

AlkuperäiskieliEnglanti
Sivut20588-20607
Sivumäärä20
JulkaisuIndustrial and Engineering Chemistry Research
Vuosikerta62
Numero48
DOI - pysyväislinkit
TilaJulkaistu - 6 jouluk. 2023
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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